Fig. 6

Medial patellofemoral ligament (MPFLL) and lateral patellar retinaculum length (LRR) measurements on axial PD-fatsat MRI crossing through the patellar center. a MPFL/LPR ratio of 42.77/50.20 = 0.85 was within normal limits. b This patient has type B dysplasia and patellar subluxation. MPFL/LPR ratio was 1.51, which was higher than the cutoff value. c This patient had type B dysplasia and patellar subluxation. MPRL/LPR ratio was 1.19